SpigotCore_Main/src/de/steamwar/command/SWCommandBrigadier.java

@@ -295,7 +295,9 @@ class SWCommandBrigadier implements SWCommandInterface {
 
         private ArgumentType<?> getArgumentType(Parameter parameter, Class<?> parameterType, TypeMapper<?> typeMapper) {
             ArgumentType<?> argumentType;
-            if (parameterType == int.class || parameterType == Integer.class) {
+            if (parameterType == boolean.class || parameterType == Boolean.class) {
+                argumentType = BoolArgumentType.bool();
+            } else if (parameterType == int.class || parameterType == Integer.class) {
                 SWCommand.IntRange intRange = parameter.getAnnotation(SWCommand.IntRange.class);
                 if (intRange != null) {
                     argumentType = IntegerArgumentType.integer(intRange.min(), intRange.max());